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02/04/2019

Digital Energy Meter OR Static Energy Meter

The Digital
Energy meter works on Digital Integration operating principle. There are no
moving parts in it therefore it is also called as Static Energy Meter. The
output of the meter is directly proportional to Digital pulse in it.

Meter constant :
Number of Pulses / kWh

One Pulse = ( 5 Wh ) * ( CT ratio ) * ( PT
ratio )

If the CT ratio
is 100/5 = 20 and

PT ratio 11 kV /
110 V = 100 then

One Pulse = ( 0.005
Wh ) * ( 20 ) * ( 100 )

= 10 Wh

= 0.01 kWh

= 0.01 Unit

There is a seven
segment LED / LCD display in this type of energy meter.

Specification
of Single Phase Digital Energy Meter

Supply voltage :
240 V, Single phase, two wires

Frequency : 50
Hz

Current : 0 – 40
Amp

Class : 1.0

Meter Constant :
3200 Pulses / unit

Standard : IS –
13779

Display : Seven
segment LCD , 7 Digit

Reference
temperature : 27 oC

The design of
Digital energy meter is based on ASIC ( Application Specific integrated circuit
) and its manufacturing is one by Surface mount technology.